Co-beta zeolit vysoce aktivní v reakci propan-SCR-NOx v přítomnosti vodní páry: efekt přípravy zeolitu a distribuce Al ve skeletu

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F04%3A00107577" target="_blank" >RIV/61388955:_____/04:00107577 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Co-beta Zeolite Highly Active in Propane-SCR-NOx in the Presence of Water Vapor: Effect of Zeolite Preparation and Al Distribution in the Framework

Popis výsledku v původním jazyce

CoNH4-beta and CoH-beta zeolites, with various Co loadings were prepared by Co ion exchange into NH4- and H-beta parent zeolites, from which the template was removed by calcination of the as-synthesized beta zeolite in a stream of ammonia and oxygen, respectively. It has been found that the CoNH4-beta zeolites, in contrast to CoH-beta zeolites, exhibited high and stable activity in selective catalytic reduction of NOx with propane in the presence of water vapor (10 %). To analyze the reasons of the exceptional activity of CoNH4-beta zeolites, both zeolite preparations were studied with respect to the state and location of aluminium, character of Al-related acid sites and Co ion exchange capacity by means of FTIR spectra of OH groups of dehydrated zeolites and those after adsorption of d3-acetonitrile, 29Si , 27Al and 27Al 3Q MAS NMR spectra. It has been shown that the procedure of template removal in an ammonia stream (in contrast to standard calcination in oxygen).

Název v anglickém jazyce

Co-beta Zeolite Highly Active in Propane-SCR-NOx in the Presence of Water Vapor: Effect of Zeolite Preparation and Al Distribution in the Framework

Popis výsledku anglicky

CoNH4-beta and CoH-beta zeolites, with various Co loadings were prepared by Co ion exchange into NH4- and H-beta parent zeolites, from which the template was removed by calcination of the as-synthesized beta zeolite in a stream of ammonia and oxygen, respectively. It has been found that the CoNH4-beta zeolites, in contrast to CoH-beta zeolites, exhibited high and stable activity in selective catalytic reduction of NOx with propane in the presence of water vapor (10 %). To analyze the reasons of the exceptional activity of CoNH4-beta zeolites, both zeolite preparations were studied with respect to the state and location of aluminium, character of Al-related acid sites and Co ion exchange capacity by means of FTIR spectra of OH groups of dehydrated zeolites and those after adsorption of d3-acetonitrile, 29Si , 27Al and 27Al 3Q MAS NMR spectra. It has been shown that the procedure of template removal in an ammonia stream (in contrast to standard calcination in oxygen).

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/1P04OCD15.20" target="_blank" >1P04OCD15.20: Struktury kationtů v oxidických matricích</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2004

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Catalysis

ISSN

0021-9517

e-ISSN

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Svazek periodika

227

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

352-366

Kód UT WoS článku

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EID výsledku v databázi Scopus

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